openapi: 3.1.0
info:
  title: Workday Financials Workday Expenses API
  description: >-
    API for expense report submission, approval workflows, receipt management,
    and expense policy enforcement within Workday Expense Management.
  version: v38.2
  contact:
    name: Workday Support
    url: https://www.workday.com/en-us/company/latest/support.html
  termsOfService: https://www.workday.com/en-us/legal.html
externalDocs:
  description: Workday Expenses API Documentation
  url: https://community.workday.com/sites/default/files/file-hosting/productionapi/index.html
servers:
  - url: https://{tenant}.workday.com/api/expenses/v38.2
    description: Workday Expenses Production
    variables:
      tenant:
        description: Workday tenant identifier
        default: your-tenant
tags:
  - name: Expense Items
    description: Manage individual expense line items
  - name: Expense Policies
    description: Access expense policy configurations
  - name: Expense Reports
    description: Create and manage expense reports
  - name: Receipts
    description: Upload and manage expense receipts
security:
  - bearerAuth: []
paths:
  /expenseReports:
    get:
      operationId: listExpenseReports
      summary: Workday Financials List expense reports
      description: >-
        Retrieve a collection of expense reports with optional filtering.
      tags:
        - Expense Reports
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
        - name: status
          in: query
          description: Filter expense reports by status
          schema:
            type: string
            enum:
              - Draft
              - Submitted
              - Approved
              - Paid
              - Returned
              - Canceled
        - name: worker
          in: query
          description: Filter by worker ID
          schema:
            type: string
      responses:
        '200':
          description: Expense reports retrieved successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/ExpenseReport'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createExpenseReport
      summary: Workday Financials Create an expense report
      description: >-
        Submit a new expense report for approval processing.
      tags:
        - Expense Reports
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ExpenseReportCreate'
      responses:
        '201':
          description: Expense report created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExpenseReport'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /expenseReports/{id}:
    get:
      operationId: getExpenseReport
      summary: Workday Financials Get an expense report
      description: >-
        Retrieve details of a specific expense report.
      tags:
        - Expense Reports
      parameters:
        - $ref: '#/components/parameters/resourceId'
      responses:
        '200':
          description: Expense report details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExpenseReport'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateExpenseReport
      summary: Workday Financials Update an expense report
      description: >-
        Update a draft expense report.
      tags:
        - Expense Reports
      parameters:
        - $ref: '#/components/parameters/resourceId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ExpenseReportUpdate'
      responses:
        '200':
          description: Expense report updated successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExpenseReport'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /expenseReports/{id}/submit:
    post:
      operationId: submitExpenseReport
      summary: Workday Financials Submit an expense report for approval
      description: >-
        Submit a draft expense report into the approval workflow.
      tags:
        - Expense Reports
      parameters:
        - $ref: '#/components/parameters/resourceId'
      responses:
        '200':
          description: Expense report submitted successfully
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /expenseReports/{id}/expenseItems:
    get:
      operationId: listExpenseItems
      summary: Workday Financials List expense items for a report
      description: >-
        Retrieve expense line items for a specific expense report.
      tags:
        - Expense Items
      parameters:
        - $ref: '#/components/parameters/resourceId'
      responses:
        '200':
          description: Expense items retrieved successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/ExpenseItem'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: addExpenseItem
      summary: Workday Financials Add an expense item to a report
      description: >-
        Add a new expense line item to an existing expense report.
      tags:
        - Expense Items
      parameters:
        - $ref: '#/components/parameters/resourceId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ExpenseItemCreate'
      responses:
        '201':
          description: Expense item added successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExpenseItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /receipts:
    post:
      operationId: uploadReceipt
      summary: Workday Financials Upload a receipt
      description: >-
        Upload a receipt image for attachment to an expense item.
      tags:
        - Receipts
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
                - file
              properties:
                file:
                  type: string
                  format: binary
                  description: Receipt image file
                description:
                  type: string
                  description: Description of the receipt
      responses:
        '201':
          description: Receipt uploaded successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Receipt'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /receipts/{id}:
    get:
      operationId: getReceipt
      summary: Workday Financials Get a receipt
      description: >-
        Retrieve details of a specific receipt.
      tags:
        - Receipts
      parameters:
        - $ref: '#/components/parameters/resourceId'
      responses:
        '200':
          description: Receipt details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Receipt'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteReceipt
      summary: Workday Financials Delete a receipt
      description: >-
        Delete a receipt that is not attached to a submitted expense report.
      tags:
        - Receipts
      parameters:
        - $ref: '#/components/parameters/resourceId'
      responses:
        '204':
          description: Receipt deleted successfully
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /expensePolicies:
    get:
      operationId: listExpensePolicies
      summary: Workday Financials List expense policies
      description: >-
        Retrieve a collection of expense policies.
      tags:
        - Expense Policies
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
      responses:
        '200':
          description: Expense policies retrieved successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/ExpensePolicy'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: OAuth 2.0 bearer token obtained from Workday authentication
  parameters:
    resourceId:
      name: id
      in: path
      required: true
      description: Unique identifier of the resource (WID)
      schema:
        type: string
    limit:
      name: limit
      in: query
      description: Maximum number of results to return
      schema:
        type: integer
        default: 20
        maximum: 100
    offset:
      name: offset
      in: query
      description: Number of results to skip for pagination
      schema:
        type: integer
        default: 0
  responses:
    Unauthorized:
      description: Authentication credentials are missing or invalid
    NotFound:
      description: The requested resource was not found
    BadRequest:
      description: The request was malformed or contained invalid data
  schemas:
    ExpenseReport:
      type: object
      properties:
        id:
          type: string
          description: Workday ID (WID) for the expense report
        reportNumber:
          type: string
          description: System-generated report number
        memo:
          type: string
          description: Expense report memo or description
        worker:
          $ref: '#/components/schemas/WorkerRef'
        expenseDate:
          type: string
          format: date
          description: Primary expense date
        totalAmount:
          type: number
          format: double
          description: Total expense amount
        currency:
          $ref: '#/components/schemas/CurrencyRef'
        status:
          type: string
          enum:
            - Draft
            - Submitted
            - Approved
            - Paid
            - Returned
            - Canceled
          description: Current status of the expense report
        company:
          $ref: '#/components/schemas/CompanyRef'
        createdOn:
          type: string
          format: date-time
          description: When the report was created
    ExpenseReportCreate:
      type: object
      required:
        - memo
        - expenseDate
        - company
      properties:
        memo:
          type: string
          description: Expense report memo or description
        expenseDate:
          type: string
          format: date
          description: Primary expense date
        company:
          $ref: '#/components/schemas/CompanyRef'
        currency:
          $ref: '#/components/schemas/CurrencyRef'
    ExpenseReportUpdate:
      type: object
      properties:
        memo:
          type: string
          description: Updated memo or description
        expenseDate:
          type: string
          format: date
          description: Updated expense date
    ExpenseItem:
      type: object
      properties:
        id:
          type: string
          description: Workday ID (WID) for the expense item
        expenseItemType:
          type: string
          description: Type of expense (e.g., Airfare, Hotel, Meals)
        amount:
          type: number
          format: double
          description: Expense amount
        currency:
          $ref: '#/components/schemas/CurrencyRef'
        date:
          type: string
          format: date
          description: Date the expense was incurred
        memo:
          type: string
          description: Description of the expense
        receipt:
          $ref: '#/components/schemas/ReceiptRef'
        costCenter:
          $ref: '#/components/schemas/CostCenterRef'
    ExpenseItemCreate:
      type: object
      required:
        - expenseItemType
        - amount
        - date
      properties:
        expenseItemType:
          type: string
          description: Type of expense
        amount:
          type: number
          format: double
          description: Expense amount
        currency:
          $ref: '#/components/schemas/CurrencyRef'
        date:
          type: string
          format: date
          description: Date the expense was incurred
        memo:
          type: string
          description: Description of the expense
        receipt:
          $ref: '#/components/schemas/ReceiptRef'
    Receipt:
      type: object
      properties:
        id:
          type: string
          description: Workday ID (WID) for the receipt
        fileName:
          type: string
          description: Name of the uploaded receipt file
        contentType:
          type: string
          description: MIME type of the receipt file
        uploadedOn:
          type: string
          format: date-time
          description: When the receipt was uploaded
        description:
          type: string
          description: Description of the receipt
    ExpensePolicy:
      type: object
      properties:
        id:
          type: string
          description: Workday ID (WID) for the expense policy
        name:
          type: string
          description: Expense policy name
        description:
          type: string
          description: Policy description
        active:
          type: boolean
          description: Whether the policy is currently active
        maxAmount:
          type: number
          format: double
          description: Maximum allowable amount per expense
        requiresReceipt:
          type: boolean
          description: Whether receipts are required
    WorkerRef:
      type: object
      properties:
        id:
          type: string
          description: Workday ID of the worker
        descriptor:
          type: string
          description: Display name of the worker
    CompanyRef:
      type: object
      properties:
        id:
          type: string
          description: Workday ID of the company
        descriptor:
          type: string
          description: Display name of the company
    CurrencyRef:
      type: object
      properties:
        id:
          type: string
          description: Workday ID of the currency
        descriptor:
          type: string
          description: Currency code (e.g., USD, EUR)
    CostCenterRef:
      type: object
      properties:
        id:
          type: string
          description: Workday ID of the cost center
        descriptor:
          type: string
          description: Display name of the cost center
    ReceiptRef:
      type: object
      properties:
        id:
          type: string
          description: Workday ID of the receipt
        descriptor:
          type: string
          description: Display name of the receipt